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Revocation of firearm certificates. 
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5.—The superintendent of the Gárda Síochána of the district in which the holder of a firearm certificate resides may at any time revoke such certificate if he is satisfied that the holder of such certificate— 
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(a) has no good reason for requiring the firearm to which the certificate relates, or 
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(b) is a person who cannot, without danger to the public safety or to the peace, be permitted to have a firearm in his possession, or 
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(c) is a person who is declared by this Act to be disentitled to hold a firearm certificate, or 
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(d) where the firearm certificate limits the purposes for which the firearm to which it relates may be used, is using such firearm for purposes not authorised by the certificate. 
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